Stable Huawei micro certification, stable Huawei cloud database service practice

Huawei cloud database service practice

The key RDS The service is introduced

RDS Overview of cloud services and key technologies

Self test questions

DRS： Data replication services

DDM： Distributed database middleware

OBS： Object storage service

Common test questions

DDM

Distributed database middleware （Distributed Database Middleware, abbreviation DDM）, Is a Distributed relational database middleware . compatible MySQL agreement , Focus on solving the problem of distributed database expansion , Break through the capacity and performance bottlenecks of traditional databases , High concurrent access to massive data .

DRS

Data replication services （Data Replication Service, abbreviation DRS） It's easy to use 、 Stable 、 Efficient 、 Cloud services for real-time database migration and real-time database synchronization .

• Live migration

  Real time migration refers to when the data replication server can connect the source database and the target database at the same time , You only need to configure the migration source 、 The target database instance and migration object can complete the whole data migration process , Then through the comparative analysis of multiple indicators and data , Help determine the right time to cut business , Realize database migration that minimizes business interruption .

• Backup migration

  For safety reasons , Database IP Sometimes the address cannot be exposed on the public network , But select dedicated network for database migration , The cost is high . In this case , You can choose the backup migration provided by the data replication service , By exporting the data of the source database into a backup file , And upload to the object storage service , Then restore to the target database . Backup migration can help you when the cloud service does not touch the source database , Realize data migration .

• Real time synchronization

  Real time synchronization is between different systems , Copy data from one data source to another database through synchronization technology , And be consistent , Realize real-time data flow of key business .

• Data subscription

  Data subscription refers to obtaining data change information of key businesses in the database , Such information is often needed by downstream businesses . Data subscription caches it and provides a unified SDK Interface , Facilitate downstream business subscription 、 obtain 、 Co consumption , So as to realize the decoupling between the database and the downstream system , Business process decoupling .

  Common scenarios ：kafka subscribe MySQL Incremental data .

• Real time disaster recovery

  In order to solve the service unavailability caused by regional failure , Data replication service launches disaster recovery scenario , Provide database synchronization guarantee for user business continuity . You can easily realize disaster recovery from off cloud database to on cloud 、 Database disaster recovery across cloud platforms , No need to invest huge amounts of infrastructure in advance .

  Data disaster recovery supports two places and three centers 、 Disaster recovery architecture of two places and four centers . Unilateral disaster recovery can take advantage of the promotion of disaster recovery scenarios 、 The backup reduction function can realize the effect of remote active and standby switching .

Supported database engine

• Live migration

  • MySQL
  • MongoDB
  • DDS
  • MySQL Sub database and sub table

• Backup migration

  • Migration from a higher version to a lower version is not supported .
  • Microsoft SQL

• Real time synchronization

  • MySQL
  • PostgreSQL
  • DDM
  • Oracle
  • GaussDB(for openGauss) Distributed version
  • GaussDB(for openGauss) Master and backup
  • DDS
  • DB2

• Data subscription

  • RDS for MySQL

    5.6、5.7 edition

• Disaster preparedness in time of disaster

  • MySQL
  • DDM
  • GaussDB(for MySQL) Master and backup

DAS

Data management services （Data Admin Service, abbreviation DAS）, Used to login and operate cloud databases Web service , Provide database development 、 Operation and maintenance 、 Intelligent diagnosis 、 Enterprise class DevOPS One stop cloud database management platform , It is convenient for users to use and operate Huawei cloud database .

GaussDB

GaussDB(for openGauss) It is a self-developed product made by Huawei Enterprise class distributed Relational database , This product has the ability of enterprise level complex transaction mixed load , At the same time, it supports excellent distributed transactions , Across the city AZ Deploy , data 0 The loss of , Support 1000+ Expand capabilities ,PB Enterprise class database features such as mass storage . Own the cloud High availability , Highly reliable , High security *, Stretch and stretch , One key deployment , Fast backup recovery , Monitoring, warning and other key capabilities , It can provide comprehensive functions for enterprises , Stable and reliable , Extensibility is strong , Enterprise database service with superior performance .

Application scenarios

• Transactional applications

  Big concurrent 、 Large amount of data 、 Transaction oriented application based on online transaction processing , Such as government affairs 、 Finance 、 Online retailers 、O2O、 telecom CRM/ Billing, etc , Service capability supports high expansion 、 Elastic expansion and contraction , Applications can choose different deployment scales as required .

• Detailed list inquiry

  Have PB Level data load capacity , Through memory analysis technology to meet the requirements of massive data storage and query , For safety 、 telecom 、 Finance 、 Detailed order inquiry business in the Internet of things and other industries .

RDS

PostgreSQL Is an open source object cloud database management system , And focus on scalability and standards compliance , Known by the industry as “ The most advanced open source database ”.

• Support postgis plug-in unit , Excellent space applications , Meet international standards . Reduce O Migration complexity 100%

• Low cost
  • Create using
  • The elastic expansion
  • Fully compatible with
  • Convenient operation and maintenance
• High performance
  • performance optimization
  • High quality hardware foundation
  • SQL Optimization plan
  • High speed access
• High security
  • Network isolation
  • Access control
  • Transmission encryption
  • Storage encryption
  • Data deletion
  • prevent DDOS attack
  • Safety protection
• high reliability
  • hot standby
  • The data backup
  • Data recovery

Rights management

Policy name / System roles	describe	Category	Dependency relationship
RDS FullAccess	All permissions of relational database service .	System strategy	nothing .
RDS ReadOnlyAccess	Read only permission of relational database service resources .	System strategy	nothing .
RDS ManageAccess	Relational database services except delete DBA jurisdiction .	System strategy	nothing .
RDS Administrator	Relational database service administrator .	System roles	rely on Tenant Guest and Server Administrator role , Check the dependent role in the same project .

The relationship between common operations and system permissions

operation	RDS FullAccess	RDS ReadOnlyAccess	RDS ManageAccess	RDS Administrator
establish RDS example	√	x	√	√
Delete RDS example	√	x	x	√
Inquire about RDS The instance list	√	√	√	√

Billing instructions

Billing items	Billing instructions
Database instance	There are two ways of monthly package and on-demand billing . The instance specification billing method under the same instance is consistent with the storage billing method .
Database storage
Backup storage （ Optional ）	RDS Some free storage space is provided , For storing your backup data , Its total capacity is about... Of your purchase capacity 100%. The amount of backup storage exceeds the storage space of the database 100%, Start charging according to the ladder .
Public network traffic	RDS The instance supports public network access , Public network access will generate bandwidth traffic charges ;RDS The traffic generated by the database instance on the cloud internal network is not charged .

Billing mode

Provide by hour 、 monthly 、 The annual billing method is flexible for you to choose , The longer you use it, the cheaper it will be .

• Prepayment （ Every year, every month ）： This purchase method offers a larger discount than pay as you need , For long-term users , Recommend this method .

• Pay as you go （ Hours ）： This purchase method is more flexible , You can start and stop immediately , Charge according to the actual use time . It is charged in natural hours , Less than one hour is charged for one hour .

• Change of billing method ： Support the conversion of package cycle and on-demand billing .

  If you need to change the billing method , Please refer to On demand instance subcontracting cycle and Packet cycle instance to on-demand Chapter to convert the billing method .